C# oracle to_date 日期型 参数传值

C#操作oracle，date字段，使用参数传值

例子一，获取三小时前的记录

 
  public  
  static DataTable Query() 
  
 { 
  
      
  const  
  string sSql =  
  " 
  select xh,lsh,name from table where gxsj>to_date(:gxsj,'yyyy-MM-dd HH24:mi:ss') 
  "; 
  
     OracleParameter[] parameters = { 
  new OracleParameter( 
  " 
  :gxsj 
  ", OracleType.VarChar,  
  10)}; 
  
     parameters[ 
  0].Value = DateTime.Now.AddHours(- 
  3).ToString( 
  " 
  yyyy-MM-dd HH 
  ") +  
  " 
  :00:00 
  "; 
  
      
  return DBUtility.DbHelperOra.Query(sSql, parameters).Tables[ 
  0]; 
  
 } 
 

 例子二，获取大于当前时间的记录

 
  public  
  static  
  string GetHphm( 
  string sClsbdh) 
  
 { 
  
      
  const  
  string sSql =  
  " 
  select name from table where sj>to_date(:yxsj,'yyyy-MM-dd') 
  "; 
  
     OracleParameter[] paramters = { 
  new OracleParameter( 
  " 
  sj 
  ", OracleType.VarChar,  
  10)}; 
  
     paramters[ 
  0].Value = DateTime.Now.ToString( 
  " 
  yyyy-MM-dd 
  "); 
  
 
  
      
  using ( 
  var mReader = DbHelperOra.ExecuteReader(sSql, paramters)) 
  
     { 
  
              
  if (mReader.Read()) 
  
             { 
  
              
  return mReader[ 
  " 
  name 
  "].ToString(); 
  
             } 
  
     } 
  
 
  
      
  return  
  ""; 
  
 }